That last segment was a metaphor of sorts. Clarkson was making a statement about where the motor industry seems to be headed, based on the constant criticism, regulation and gagging that it is subjected to. It's not a new message, every week on 'the news' they illustrate some way that the government's incompetence is preventing common sense prevailing, but what was new; and incidentally, what made it so poignant; was the presentation. Simplicity is the easiest way to sell a message, and the elegant backing track coupled with the timeline of old super cars and Jeremy's dialogue made it effective.
The point of it, as with all TG segments, was to create a reaction. And it did.